Authorities are reportedly investigating a package containing a suspicious substance Donald Trump Jr. received at his New York City residence, and the president’s eldest son delivered choice words to those cheering the news on social media.

Don Jr’s wife, Vanessa Trump, was at the apartment at the time of delivery and opened the package, and she was one of three people hospitalized as a precaution to the incident.

Though most people reacted appropriately to the scare, plenty did not, and Trump took notice.

“Thankful that Vanessa & my children are safe and unharmed after the incredibly scary situation that occurred this morning,” he tweeted. “Truly disgusting that certain individuals choose to express their opposing views with such disturbing behavior.”

Thankful that Vanessa & my children are safe and unharmed after the incredibly scary situation that occurred this morning. Truly disgusting that certain individuals choose to express their opposing views with such disturbing behavior.